AK's, Steyr AUG's, Sig 556's, H&K 91's, standard M1A's as well as stock AR-15 and M-4 Carbine clones would compete as Modern Military Rifles category.

2016 CMP rules now include caliber .223 AR type rifles with up to 4.5x optics and weighing up to 8.5 pounds in The Modern Sporting Rifle category A.
"5.2.3 U.S. Modern Sporting Rifles, Class A
Category A Modern Sporting Rifles must comply with these additional requirements:
 Rifles based on the M-16 or AR design and manufactured by a USA manufacturer must be used.
 Total rifle weight, with sights and without sling, may not exceed 8.5 pounds.
 No special accurizing is permitted"5.2.3 U.S. Modern Sporting Rifles, Class A
Category A Modern Sporting Rifles must comply with these additional requirements:
 Rifles based on the M-16 or AR design and manufactured by a USA manufacturer must be used.
 Total rifle weight, with sights and without sling, may not exceed 8.5 pounds.
 No special accurizing is permitted except that a non-adjustable sling swivel may be attached to the forward end of the hand-guard.
 The rifle must be chambered for the 5.56x45 mm or .223 Remington cartridge."

Accurized Service Rifles (M-14/M1A and M-16/AR-15) and NRA/ISU Match Rifles are not eligible to compete. Shooters firing ineligible rifles can qualify for clinic completion certificates but will otherwise be firing for practice only.)

Scores reporting to CMP
Official CMP scorecards will be used. Any center-fire high power rifles with metallic sights (CMP Rule 6 and NRA Rule 3.2) may be used to fire the match. Scores will only be reported to the CMP for the following categories.